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RALFL34 regulates formative cell divisions in Arabidopsis pericycle during lateral root initiation.


ABSTRACT: In plants, many signalling molecules, such as phytohormones, miRNAs, transcription factors, and small signalling peptides, drive growth and development. However, very few small signalling peptides have been shown to be necessary for lateral root development. Here, we describe the role of the peptide RALFL34 during early events in lateral root development, and demonstrate its specific importance in orchestrating formative cell divisions in the pericycle. Our results further suggest that this small signalling peptide acts on the transcriptional cascade leading to a new lateral root upstream of GATA23, an important player in lateral root formation. In addition, we describe a role for ETHYLENE RESPONSE FACTORs (ERFs) in regulating RALFL34 expression. Taken together, we put forward RALFL34 as a new, important player in lateral root initiation.

SUBMITTER: Murphy E 

PROVIDER: S-EPMC4983113 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature

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RALFL34 regulates formative cell divisions in Arabidopsis pericycle during lateral root initiation.

Murphy Evan E   Vu Lam Dai LD   Van den Broeck Lisa L   Lin Zhefeng Z   Ramakrishna Priya P   van de Cotte Brigitte B   Gaudinier Allison A   Goh Tatsuaki T   Slane Daniel D   Beeckman Tom T   Inzé Dirk D   Brady Siobhan M SM   Fukaki Hidehiro H   De Smet Ive I  

Journal of experimental botany 20160718 16


In plants, many signalling molecules, such as phytohormones, miRNAs, transcription factors, and small signalling peptides, drive growth and development. However, very few small signalling peptides have been shown to be necessary for lateral root development. Here, we describe the role of the peptide RALFL34 during early events in lateral root development, and demonstrate its specific importance in orchestrating formative cell divisions in the pericycle. Our results further suggest that this smal  ...[more]

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